case :
-transproxy is a necessity.
-need authentification too.
would it be possible to set up two squids, one managing transproxy and
cache and the parent (light with little or no cache) managing
authentification ?
-even better : squids runnning on the same machine.

Where the auth process would break as it's not the client that directly
asks for authentification ?

I tried to do so but i have to admit this does not work.
as i'm far to be positive about my setup, i'd like very much to get a
quick note on that.